Shedding mechanism for looms.



PATENTED APR. 14, 1908. 13. H. RYON.

SHEDDING MECHANISM FOR Looms.

APPLIOATION mm) Maize. 1905.

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UNITED STATES PATENT OFFICE.

EPPA H. RYON, OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON & KNOWLES LOOM WORKS, A CORPORATION OF MASSACHUSETTS.

SHEDDING MECHANISM FOR LOOMS.'

Application filed December 29, 1905.

' specification.

My invention relates to shedding mechanism for looms, and more particularly to a dobby, so-termed, and the object of my invention is to improve u on the construction of a dobby, as ordinari y made.

In my improved construction of a dobby, I provide improved mechanism for operating the lifter bars, which consists preferably of a vertically extending rock shaft having two crank arms thereon, and connections therefrom to the lifter bars, said rock shaft operated from some driven part of the loom, through bevel gear connections.- I also provide improved harness jacks, each having two fulcrum oints, and each having the two hooks to the Fifter bars pivotally attached directly on the harness jacks.

I have only shown in the drawings a detached portion of a dobby embodying my improvements, suflicient to enable those skilled in the art to understand the construction and operation of the same.

Referring to the drawings :Figure 1 is a front side elevation of portions of a dobby, showing my improvements a plied thereto. Fig. 2 is a horizontal section, through the u per part of the dobby, taken at a point in icated by line 2, 2, Fig. 1, looking in the direction of arrow a, same figure; the guide arm for the upper lift'cr bar is in section; the broken lines show the opposite position of the rock shaft and u per crank arm. Fig. 3 is a sectional edge view of the driving mechanism of the vertical rock shaft, taken at a point indicated by line 3, 3, Fig. 1, looking in the direction of arrow b, same figure. Fig. 4 is a central vertical section through the dobby shown in Fig. 1, showing the harness jacks and the hooks, and other parts, detached. Fig. 5 corresponds to Fig. 4, but shows a different position of the parts.

In the accompanying drawings, 1 is the front dobby frame or side, which in connec tion with a rear frame, not shown, is adapted to support the several parts of the dobby, in the usual way.

2 is a worm gear on the end of the shaft 3,v

Specification of Letters Patent.

Patented April 14, 1908.

Serial No. 293,708.

which carries the pattern chain cylinder, not shown, and which has pins thereon to engage and move the pattern indicator fingers or le vers 4, and 5, partially shown in Figs. 4, and 5. The indicator levers 4, and 5 are pivotally supported on a transverse rod 6, and extend over the pattern chain cylinder at their outer ends, not shown, in the usual way. At their inner ends, one set of pattern indicator levers, as 4, are provided with a recess 4 therein to receive the lower end of an upright wire 7, which extends under and engages an upper hook 8, and the inner end of the other set of pattern indicator levers, as 5, has an upward projection 5 thereon, which extends under and engages directly with a lower hook 9. The upper set of hooks 8 are moved longitudinally by a horizontally moving lifter bar 10, and the lower set of hooks 9 are moved horizontally by the lower lifter bar 1 1.

The worm gear 2 meshes with and is driven by a worm 12, fast on the rotary shaft 13, which turns in bearings 14. A bevel gear 15 is fast on the opposite end of the shaft 13, and meshes with and is driven by a bevel gear 16 fast on an upright shaft 17, which is supported at its upper end in a bearing 18, and has a rotary movement communicated thereto from some driven part of the loom, not shown.

All of the above mentioned parts may be of the usual and well known construction.

I will now describe my improvements.

The lifter bars 10 and 11 have a simultaneous reciprocating movement in this instance in the same direction in a horizontal plane, in the slots 1, and 1 in the frame 1. To each end of the upper lifter bar 10, (only one end is shown in the drawing, Fig. 1,) is pivotally attached by a pin 19, a yoked or bifurcated rod head 20 adjustable on the outer end of a rod 20. The other end of the rod 20 has a hub 20 thereon which fits loosely over a stud or pin 21, which is adjustably secured in an elongated slot 22, see Fig. 2, in a crank arm 22 on the upper end of a vertically extending rock shaft 23, supported and having a rocking, or reciprocating rotary motion in bearings 24, secured to the dobby frame 1.

The rock shaft 23 is preferably made with the portion intermediate its ends, offset from the center line or axis of its bearing ends, see Fig. 3. On the lower end of the rocks shaft 23 is a second crank arm 25, extending in this instance in the same direction as the upper crank arm 22, and having an elongated slot therein to receive a stud 26, which may be adjustably secured in said slot. On the stud 26 is pivotally mounted the hub 27 on the inner end of the rod 27. On the outer end of the rod 27 is a yoked or bifurcated rod head 27 which is pivotally connected by a pin 28 with one end of the lower lifter bar 11. On the upper end of the rock shaft 23 is fast a bevel gear 29, which meshes with and is driven by a bevel gear segment 30 having a hub 30 fast on a transverse shaft 31, mounted in a suitable bearing 31, see Fig. 3.

It willbe understood, that the transverse shaft 31 has fast on its other end, at the rear of the dobby frame, a bevel gear segment,

which meshes with and operates a bevel gear fast on a vertically extending rock shaft, similar to the shaft 23, and having two crank arms thereon, and connections therefrom to the up er and lower lifter bars 10 and 11. The beve gear segment 30 has an operating arm 30", extending out from the hub there of, which has an elongated slot 30 therein, to receive a stud 32, adjust-ably secured in said slot, and pivotally connected with the upper end of the vertically moving rod 33. The lower end of the rod 33 is connected to some driven part of the loom, not shown, to have an intermittent movement communicated thereto, at regular intervals.

Through the vertical movement of the rod 33, and the movement of the arm 30, and the bevel gear segment 30 and gear 29, a rocking movement is communicated to the vertically extending shaft 23, and also to a similar shaft not shown at the rear of the dobby frame, and through arm 22, and connector 20 to the upper lifter bar 10, and arm 25 and connector 27 to the lower lifter bar 11, at the front and rear of the dobby frame, a movement is communicated to said lifter bars, to cause the same to move simultaneously in or out in the slots 1 and 1, and through the engagement with said lifter bars 10 and 11 of the hook jacks 8, and 9, according to the indications of the pattern surface, not shown, .a movement is communicated to the harness jacks, to raise the harnesses, through connections not shown, or to allow the harnesses to be lowered, through actuating springs, not shown, in the usual way. By means of the adjustment of the lifter bar connectors in the crank arms, the amount of movement of either lifter bar may be varied, as desired.

I will now describe my improvements in harness jacks.

Each harness jack 34, see Figs. 4 and 5, has two fulcrum points, one at its lower end, which in this instance consists of a transverse angle shaped bar 35, forming a part of or secured to the dobby frame, and having outwardly' extending projections 35 thereon, which act as a comb for guiding and keeping in proper position the lower ends of the jacks, which in this instance have downwardly extending projections 34 thereon, which extend between said projections 35. The other fulcrum point for the jacks 34 is located intermediate the ends-of the jacks, and consists in this instance of a transverse rod 36, secured to the front and rear frames of the dobby. Each jack 34 has an opened end slot or recess 34 on its inner edge, to receive the transverse rod 36, and said rod 36 extends through said recesses 34 Each jack 34 has pivotally mounted thereon two hooks 8, and 9, the lower hook 9 is pivotally attached to the lower end of the jack, and is adapted to be operated by the lower lifter bar 11, and. the upper hook 8 is pivotally attached to the jack intermediate its ends, near the inner end of the recessed portion therein, and is adapted to be operated by the upper lifter bar 10.

The operation of my improved harnessjacks will be readily understood by those skilled in the art. In case the lifter bars 10 and 11 are moved outwardly, as shown in Fig. 4, through the rotation of the vertically extending shaft 23, and connections therefrom to said lifter bars, then the engagement of the up er hooks 8 with }the upper lifter bar 10, wi draw the harness jack 34, carrying said hooks, outwardly, to raise the harness connected with said jack, the transverse bar 35 acting as a fulcrum for the lower end of said jack. In case of the inward movement of the lifter bars 10 and 11, as shown in Fig. 5, the actuating spring on the harness connected with the outer jack 34, will move inwardly said jack at its upper end, and cause the slot 34 therein to move on the transverse rod 36,

until the transverse rod is at the inner end of said slot, when said rod acts as a fulcrum for the harness jack 34, and the inward movement ofthe lower lifter bar 11, engaging the hook 9 on the jack 34, will move inwardly the lower end of said jack 34 on the fulcrum rod 36, and move outwardly the upper end of said jack, to raise the harness, not shown, see Fig. 5, and this operation will be repeated, according to the indications of the pattern surface.

It will be understood that the details of construction of my improvements may be varied if desired, and the driving mechanism of the lifter bars may be adapted to be used on a dobby of ordinary construction.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is I 1. In a dobby, the combination with the upper and lower lifter bars, for actuating the hooks connected with the harness jacks and said hooks and harness jacks, of means for moving said lifter bars simultaneously, said means comprising vertically extending rock shafts having two crank arms thereon, and a connection from each crank arm to one end of a lifter bar.

2. In a dobby, the combination with the upper and lower lifter bars, for actuating the hooks connected with the harness jacks and said hooks and harness jacks, of means for moving said lifter bars simultaneously, in the same direction, said means comprising a vertically extending rock shaft having two crank arms thereon, and a connection from each crank arm to one end of a lifter bar.

3. In a dobby, the combination with the upper and lower lifter bars for actuating the hooks connected with the harness jacks and said hooks and harness jacks, of means for moving said lifter bars simultaneously in the same direction, said means consisting of a vertically extending rock shaft having two crank'arms thereon, and a connection from each crank arm to one end of a lifter bar, and means for communicating an intermittent rocking motion to said rock shaft.

4. In a dobby, the combination with the upper and lower lifter bars for actuating the hooks connected with the harness jacks and said hooks and harness jacks, of means for moving said lifter bars simultaneously in the same direction, said means comprising a vertically extending rock shaft having two crank arms thereon, and a connection from each crank arm to one end of a lifter bar, and means for communicating an intermittent rocking motion to said rock shaft, through a bevel gear on said rock shaft, and a bevel gear segment meshing with said gear, and means for operating said segment.

5. In a dobby, a vertically extending rock shaft having two crank arms thereon, each crank arm connected with one end of a lifter bar and said lifter bar, to communicate a simultaneous movement to the two lifter bars, through the rocking movement of said shaft.

6. In a dobby, a harness jack having a fulcrum near one end, and a second fulcrum intermediate the ends, said jack adapted to be rocked about either fulcrum.

7. In a dobby having an upper and lower lifter bar, the combination with a harness jack having two fulcrum points, of two hooks, one for the upper and the other for the lower 1 lifter bar, said hooks pivoted directly on said 8. In a. dobby, a harness jack having two fulcrums, one of said fulcrums adjacent one end thereof, the other of said fulcrums intermediate the ends of said jack, two hooks pivotally connected to said jack near the fulcrums thereof, and means to operate the said hooks, to rock the jack about either fulcrum.

9. In a dobby, a harness jack having a fulcrum near one end thereof, a second fulcrum intermediate the ends, a support for the said jack at one of its fulcrums, and a-guide adj acent the other fulcrum.

10. In a dobby, a harness jack to be rocked or turned about two fulcrums, one of said fulcrums to support said jack, and reciprocating lifter bars, and connections intermediate said lifter bars and said jack, near the fulcrums thereof.

11. In a dobby, the combination with a harness jack having a slot or recess intermediate its ends, of a transverse bar to be engaged by the lower end of said jack, and act as a fulcrum therefor, and a second trans verse rod or bar extending through said slot or recess to engage the closed end thereof, and act as a second fulcrum for said jack.

12. In a dobby, the combination with a harness jack having a slot or recess intermediate its ends, of a transverse bar to be engaged by the lower end of said jack, and act as a fulcrum therefor, and a second transverse rod or bar extending through said slot or recess to engage the closed end thereof, and act as a second fulcrum for said jack, and means for guiding said jack.

13. In a dobby, the combination with a harness jack having a slot or recess intermediate its ends, of a transverse bar to be engaged by the lower end of said jack, and act as a fulcrum therefor, and having extensions thereon to guide said jack, and a second transverse rod or bar extending through said slot or recess which support said jack, and to engage the closed end of said recess and act as a second fulcrum for said jack.

EPPA H. RYON. 

